Product specifications and features

Product Description

Acorus gramineus 'Pusillus' - Dwarf Slender Sweet Flag, Pond Marginal Plant

Acorus gramineus 'Pusillus' (now listed as Acorus gramineus var. pusillus), known as dwarf slender sweet flag, is a very small form of slender sweet flag. It forms tight, slowly spreading fans of narrow, grassy, mid-green leaves that stay semi-evergreen.

Dwarf slender sweet flag at a glance

Botanical name Acorus gramineus var. pusillus (syn. A. gramineus 'Pusillus')
Common name Dwarf slender sweet flag, dwarf Japanese rush
Plant type Semi-evergreen, slowly spreading clump
Height and spread About 10–20 cm tall, spreading slowly
Flowers Insignificant; grown for its foliage
Position Full sun
Soil Wet or very moist, fertile soil
Pond depth Wet soil or very shallow water around the roots
Hardiness RHS H6 – hardy in a very cold winter (-20 to -15°C) (species rating)
Native to Eastern Himalayas to Japan and the Philippines (not UK native)

Where to plant it

  • The very shallow edge of a small pond
  • Container ponds and wet soil
  • Full sun

How to plant and care for it

Plant in wet, fertile soil or in a basket in very shallow water. The RHS describes the species as generally free of pests and diseases.

Which size should I buy?

Bare-root plants (7 cm, 9 cm, 1 litre and 3 litre) arrive without a pot or compost and are the most economical way to plant a group. Potted plants (9 cm, 1 litre and 3 litre) arrive growing in our peat-free compost and give a faster display. Packs of 3 come in 7 cm, 9 cm, 1 litre and 3 litre bare-root sizes and cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.